The physical properties and electrochemical performance of Ca-doped Sr2MgMoO6-δ as perspective anode for solid oxide fuel cells

Осинкин, Д.А.; Zabolotskaya, E. V.; Келлерман, Д. Г.; Suntsov, A. Yu.

doi:10.1007/s10008-017-3868-9

Cited by 13 publications

(7 citation statements)

References 36 publications

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“…After feeding a mixture containing 100 ppm H 2 S in H 2 at 800 °C for 90 h, the anode material remained in its single phase, but the performance of the SOFC decreased, which was attributed to the accumulation of sulfur on the buffer layer. The high sulfur tolerance of Sr 2 MgMoO 6-δ was also reported in other works [ 77 , 113 , 114 ].…”

Section: Functional Properties Of Sr 2 Mmoo supporting

confidence: 84%

“…Discussing the crystal structure of Sr 2 MgMoO 6-δ , the compound can exhibit cubic (Fm3m [ 89 ]), tetragonal (I4/m [ 19 , 72 , 97 , 98 , 106 , 112 , 113 ]), monoclinic (P2 [ 37 ], P21/n [ 77 , 109 ]) or triclinic I-1 [ 101 , 103 , 104 , 108 , 111 ] crystal structures, depending on the synthesis methods. The triclinic structure was proved by neutron diffraction analysis [ 101 ].…”

Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

“…The functional properties of this compound are closely dependent on the preparation method and the reduction degree. An acceptable value of electrical conductivity was obtained in [ 100 ] when synthesizing the sample via solid state synthesis, followed by firing in 5%H 2 /N 2 in two stages, both at 1300 °C for 4 h. The lower conductivity values obtained in [ 77 , 97 , 104 , 113 ] might be associated with the fact that Sr 2 MgMoO 6-δ was subject to reduction at temperatures from 800 °C to 1200 °C. These conditions probably lead to the incomplete reduction of the molybdate; as a consequence, an insignificant concentration of Mo +5 -ions was achieved (Equation (18)).…”

Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

“…The crystal structure of Sr 2 FeMoO 6-δ is described by tetragonal symmetry with the space group I4/m [ 19 , 78 , 113 ], Р4/mmm [ 116 ], or I4/mmm [ 47 ]. Manasa et al [ 115 ] reported that this material has a cubic unit cell (sp.…”

Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

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Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

et al. 2021

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The chemical design of new functional materials for solid oxide fuel cells (SOFCs) is of great interest as a means for overcoming the disadvantages of traditional materials. Redox stability, carbon deposition and sulfur poisoning of the anodes are positioned as the main processes that result in the degradation of SOFC performance. In this regard, double perovskite molybdates are possible alternatives to conventional Ni-based cermets. The present review provides the fundamental properties of four members: Sr2NiMoO6-δ, Sr2MgMoO6-δ, Sr2FeMoO6-δ and Sr2Fe1.5Mo0.5O6-δ. These properties vary greatly depending on the type and concentration of the 3d-element occupying the B-position of A2BB’O6. The main emphasis is devoted to: (i) the synthesis features of undoped double molybdates, (ii) their electrical conductivity and thermal behaviors in both oxidizing and reducing atmospheres, as well as (iii) their chemical compatibility with respect to other functional SOFC materials and components of gas atmospheres. The information provided can serve as the basis for the design of efficient fuel electrodes prepared from complex oxides with layered structures.

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Section: Functional Properties Of Sr 2 Mmoo supporting

confidence: 84%

Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

Section: Functional Properties Of Sr 2 Mmoo mentioning

confidence: 99%

See 2 more Smart Citations

Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

et al. 2021

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“…As can be seen, the XRD patterns contain reflections of the main double perovskite structure, NiO and trace amounts of a SrMoO 4 phase ( Figure 1a) for all the materials obtained following the sintering procedure. It should be noted that the existence of the latter is a characteristic feature for compounds with a general A 2 BMoO 6 formula prepared under oxidising conditions [42][43][44].…”

Section: Phase Relationmentioning

confidence: 99%

Tailoring Ni and Sr2Mg0.25Ni0.75MoO6−δ Cermet Compositions for Designing the Fuel Electrodes of Solid Oxide Electrochemical Cells

et al. 2019

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The design of new electrode materials for solid oxide electrochemical cells, which are stable against redox processes as well as exhibiting carbon/sulphur tolerance and high electronic conductivity, is a matter of considerable current interest as a means of overcoming the disadvantages of traditional Ni-containing cermets. In the present work, composite materials having the general formula (1−x)Sr2Mg0.25Ni0.75MoO6−δ + xNiO (where x = 0, 15, 30, 50, 70 and 85 mol.%) were successfully prepared to be utilised in solid oxide fuel cells. A detailed investigation of the thermal, electrical, and microstructural properties of these composites, along with their phase stability in oxidising and reducing atmospheres, was carried out. While possessing low thermal expansion coefficient (TEC) values, the composites having low Ni content (15 mol.%–70 mol.%) did not satisfy the requirement of high electronic conductivity. Conversely, the 15Sr2Mg0.25Ni0.75MoO6−δ + 85NiO samples demonstrated very high electrical conductivity (489 S sm−1 at 850 °C in wet H2) due to well-developed Ni-based networks, and no deterioration of thermal properties (TEC values of 15.4 × 10−6 K−1 in air and 14.5 × 10−6 K−1 in 50%H2/Ar; linear expansion behaviour in both atmospheres). Therefore, this material has potential for use as a component of a fuel cell electrode system.

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Features of the electrochemical reaction of hydrogen oxidation on the composite SrFeO ₃ ‐based anode for a protonic ceramic fuel cell

Осинкин

Antonova

Поротникова

et al. 2022

Intl J of Energy Research

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BaCeO 3 -based proton-conducting electrolytes was studied for the first time. Despite the high electronic and oxygen-ionic conductivity in the SFM-SDC, its electrochemical performance was not satisfactory, while the presence of the proton-conducting phase and exsolved nickel particles on the SFNM-BCGC electrode increased the electrochemical activity about 3 to 5 times. In series SFM-SDC, SFM-BCGC, SFNM-BCGC the polarization resistance was about 1.06, 0.54, 0.37 Ohm cm 2 at 800 C and 10.02, 3.55, 2.12 Ohm cm 2 at 600 C in wet hydrogen. The presence of sufficient proton conductivity in the electrode is supposed to be crucial for the efficient performance of the anodes in contact with proton-conducting oxides.

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The physical properties and electrochemical performance of Ca-doped Sr2MgMoO6-δ as perspective anode for solid oxide fuel cells

Cited by 13 publications

References 36 publications

Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

Tailoring Ni and Sr2Mg0.25Ni0.75MoO6−δ Cermet Compositions for Designing the Fuel Electrodes of Solid Oxide Electrochemical Cells

Features of the electrochemical reaction of hydrogen oxidation on the composite SrFeO ₃ ‐based anode for a protonic ceramic fuel cell

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The physical properties and electrochemical performance of Ca-doped Sr2MgMoO6-δ as perspective anode for solid oxide fuel cells

Cited by 13 publications

References 36 publications

Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

Undoped Sr2MMoO6 Double Perovskite Molybdates (M = Ni, Mg, Fe) as Promising Anode Materials for Solid Oxide Fuel Cells

Tailoring Ni and Sr2Mg0.25Ni0.75MoO6−δ Cermet Compositions for Designing the Fuel Electrodes of Solid Oxide Electrochemical Cells

Features of the electrochemical reaction of hydrogen oxidation on the composite SrFeO 3 ‐based anode for a protonic ceramic fuel cell

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Features of the electrochemical reaction of hydrogen oxidation on the composite SrFeO ₃ ‐based anode for a protonic ceramic fuel cell